1FILE: net/xfrm/xfrm_ipcomp.c 2 3BUG: using __this_cpu_read() in preemptible [00000000] code: syzkaller157688/3312 4caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 5CPU: 0 PID: 3312 Comm: syzkaller157688 Not tainted 4.9.68-gfb66dc2 #107 6Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 7 ffff8801c56e76d8 ffffffff81d90889 0000000000000000 ffffffff83c17800 8 ffffffff83f42ec0 ffff8801d96e3000 0000000000000003 ffff8801c56e7718 9 ffffffff81df7854 ffff8801c56e7730 ffffffff83f42ec0 dffffc0000000000 10Call Trace: 11 [<ffffffff81d90889>] __dump_stack lib/dump_stack.c:15 [inline] 12 [<ffffffff81d90889>] dump_stack+0xc1/0x128 lib/dump_stack.c:51 13 [<ffffffff81df7854>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46 14 [<ffffffff81df78bc>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62 15 [<ffffffff833f3f78>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline] 16 [<ffffffff833f3f78>] ipcomp_init_state+0x188/0x930 net/xfrm/xfrm_ipcomp.c:363 17 [<ffffffff83360470>] ipcomp4_init_state+0xb0/0x7d0 net/ipv4/ipcomp.c:137 18 [<ffffffff833d2677>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2096 19 [<ffffffff833d2dda>] xfrm_init_state+0x1a/0x20 net/xfrm/xfrm_state.c:2122 20 [<ffffffff8356cb49>] pfkey_msg2xfrm_state net/key/af_key.c:1281 [inline] 21 [<ffffffff8356cb49>] pfkey_add+0x1fb9/0x3470 net/key/af_key.c:1498 22 [<ffffffff835645ee>] pfkey_process+0x61e/0x730 net/key/af_key.c:2826 23 [<ffffffff83565e99>] pfkey_sendmsg+0x3a9/0x760 net/key/af_key.c:3670 24 [<ffffffff82ecfb9a>] sock_sendmsg_nosec net/socket.c:635 [inline] 25 [<ffffffff82ecfb9a>] sock_sendmsg+0xca/0x110 net/socket.c:645 26 [<ffffffff82ed1791>] ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1968 27 [<ffffffff82ed37c6>] __sys_sendmsg+0xd6/0x190 net/socket.c:2002 28 [<ffffffff82ed38ad>] SYSC_sendmsg net/socket.c:2013 [inline] 29 [<ffffffff82ed38ad>] SyS_sendmsg+0x2d/0x50 net/socket.c:2009 30 [<ffffffff838aa9c5>] entry_SYSCALL_64_fastpath+0x23/0xc6 31